编号：CDUT-2022-03

标题：Fault-controlled carbonate-hosted barite-fluorite mineral systems: The

Shuanghe deposit, Yangtze Block, South China

入藏号： WOS:000702866800004

中国科学院文献情报中心期刊分区（升级版）：地球科学1区/TOP

本校作者：邹灏；李敏*；蒋修未；陈海锋；李忠权

来源出版物：Gondwana Research 卷 101 页26-43

出版年：2022年

第一地址：成都理工大学

关键词：双河Ba-F矿床；稀土元素；H-O-S-Sr同位素；Sm-Nd同位素；扬子地块东南缘

代表图：

Satellite image showing the spatial distribution of fault-controlled sediment-hosted Ba-F (±Pb, Zn) deposits around the world.

Ages of fault-controlled sediment-hosted Ba-F (±Pb, Zn) deposits.

Model for the mineralisation process of the fault-controlled carbonate-hosted Ba-F deposit.

摘要：Fault-controlled carbonate-hosted Ba-F deposits occur in many major orogenic belts of the world and are important repositories of fluorine production required in various fields of chemical, metallurgical glass, ceramic, and cement industries. Here we investigate the poorly documented Shuanghe barite-fluorite deposit in the Yangtze Block of South China. This deposit offers an excellent case for studying the processes of formation of fault-controlled carbonate-hosted barite-fluorite mineral system. The orebodies in Shuanghe are hosted in carbonate rocks belonging to the early Ordovician Honghuayuan Formation and are dominantly controlled by NE-trending faults. Fluorite and barite exhibit similar rare earth element patterns with positive Eu anomalies and negative Ce anomalies. We report fluorite Sm–Nd isotopic data which yielded an isochron age of 103.1 ± 1.3 Ma. The ẟ¹⁸O_V-SMOW values range from +0.2‰ to +1.1‰ and the ẟD_V-SMOW values show a range of –33.1‰ to –26.3‰. The d³⁴S_V-CDT values for barite range from 31.1‰ to 38.2‰. The bulk and in-situ Sr values for fluorite and barite show a range of 0.709081 to 0.712258. The petrological and geochemical data reported in this study suggest the following processes: (1) derivation of the ore-forming fluid from basinal water mixed with meteoric water; and (2) origin of the ore-forming components from Cambrian carbonate rocks, black shale, and Ordovician limestone. We propose a model that correlates the tectonic background of mineralisation with the Late Cretaceous subduction of the Paleo-Pacific Oceanic plate

文章链接地址： https://linkinghub.elsevier.com/retrieve/pii/S1342937X21002240